MESON Chess Problem Database

Problem Display
PID: 205805 (8/8/4N3/6Np/1p4pP/1P1k2n1/1K1p1P2/3Q4 w - - 0 1)

Cristoffanini, Guido

Il Secolo, 1925

8/8/4N3/6Np/1p4pP/1P1k2n1/1K1p1P2/3Q4

#2

7 + 6

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sf1
      • 2.Qxf1#
    • 1...Sh1
      • 2.Qf1#
    • 1...Se2
      • 2.Qc2#
      • 2.Qb1#
    • 1...Se4
      • 2.Qf1#
    • 1...Sf5
      • 2.Qf1#
  • Tries
    • 1.Sf3?
      • threat
        • 2.Sc5#
      • 1...gxf3
        • 2.Qxf3#
      • 1...Se4
        • 2.Se1#
        • 2.Se5#
        • 2.Sf4#
        • 2.Qf1#
      • 1...Ke4!
    • 1.Se4?
      • threat
        • 2.S4c5#
      • 1...Sxe4
        • 2.Qf1#
      • 1...Kxe4!
    • 1.Qxg4?
      • threat
        • 2.Sc5#
        • 2.Qf3#
        • 2.Qc4#
      • 1...d1S+
        • 2.Qxd1#
      • 1...d1Q
        • 2.Qxd1#
      • 1...d1B
        • 2.Qxd1#
      • 1...d1R
        • 2.Qxd1#
      • 1...Sf1
        • 2.Sc5#
        • 2.Qc4#
        • 2.Qe4#
      • 1...Se4
        • 2.Qf3#
        • 2.Qxe4#
      • 1...Sf5
        • 2.Sc5#
        • 2.Qc4#
        • 2.Qe4#
      • 1...hxg4!
    • 1.Qa1?
      • threat
        • 2.Qa6#
      • 1...d1S+
        • 2.Qxd1#
      • 1...d1Q
        • 2.Qxd1#
      • 1...d1B
        • 2.Qxd1#
      • 1...d1R
        • 2.Qxd1#
      • 1...Ke2!
    • 1.Qf1+?
      • 1...Se2
        • 2.Qb1#
      • 1...Sxf1!
  • Keys
    • 1.Qg1!
      • 1...d1S+
        • 2.Qxd1#
      • 1...Ke2
        • 2.Sf4#
      • 1...d1Q
        • 2.Qxd1#
      • 1...d1B
        • 2.Qxd1#
      • 1...d1R
        • 2.Qxd1#
      • 1...Sf1
        • 2.Qxf1#
      • 1...Sh1
        • 2.Qf1#
      • 1...Se2
        • 2.Qb1#
      • 1...Se4
        • 2.Qf1#
      • 1...Sf5
        • 2.Qf1#

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • S(c);N_GUARD::QAB(A),XS(c)
    • S(c);N_GUARD::QAB(A)
  • Tries
    • Try
      • S(F);
      • Threat
        • S(G)
      • Vars
        • P(e);OGATE,XS(F)::QAR2(A),XP(e)
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT
    • Try
      • S(F);
      • Threat
        • S(F)
      • Vars
        • S(c);N_GUARD,SBLOCK,XS(F)::QAB(A)
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT,XS(F)
    • Try
      • Q(A);N_PINP(a),XP(e)
      • Threat
        • DUALS(3)
      • Vars
        • P(a);CHECK,OGATEB::QAR2(A),XS(a)
        • P(a);OGATEB::QAR2(A),XQ(a)
        • P(a);OGATEB::QAR2(A),XB(a)
        • P(a);OGATEB::QAR2(A),XR(a)
      • Refutation
        • P(f);XQ(A)
    • Try
      • Q(A);N_PINP(a)
      • Threat
        • QAB(A)
      • Vars
        • P(a);CHECK,OGATEB::QAR2(A),XS(a)
        • P(a);OGATEB::QAR2(A),XQ(a)
        • P(a);OGATEB::QAR2(A),XB(a)
        • P(a);OGATEB::QAR2(A),XR(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK,N_PINP(a)
      • Vars
        • S(c);P_SPINS(c),SBLOCK::QAB(A)
      • Refutation
        • S(c);XQ(A)
  • Actual
    • Q(A);N_PINP(a)
    • Vars
      • P(a);CHECK,OGATEB::QAR2(A),XS(a)
      • K(b);S_FLIGHT::S(G)
      • P(a);OGATEB::QAR2(A),XQ(a)
      • P(a);OGATEB::QAR2(A),XB(a)
      • P(a);OGATEB::QAR2(A),XR(a)
      • S(c);N_GUARD::QAB(A),XS(c)
      • S(c);N_GUARD::QAB(A)
      • S(c);SBLOCK::QAB(A)
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